EP 3010146 A4 20170125 - AUDIO SIGNAL AMPLITUDE SUPPRESSION DEVICE

Title (en)

AUDIO SIGNAL AMPLITUDE SUPPRESSION DEVICE

Title (de)

VORRICHTUNG ZUR UNTERDRÜCKUNG EINER AUDIOSIGNALAMPLITUDE

Title (fr)

DISPOSITIF DE SUPPRESSION D'AMPLITUDE DE SIGNAL AUDIO

Publication

EP 3010146 A4 20170125 (EN)

Application

EP 14811383 A 20140326

Priority

JP 2013134290 A 20130611
JP 2013189417 A 20130912
JP 2014058601 W 20140326

Abstract (en)

[origin: EP3010146A1] When, in conventional sound systems, signals of sounds collected by a microphone are amplified and the amplified signals are applied to an ear by an earphone and a headphone, too loud sounds and environmental noises are unpleasant, and the intelligibility of words are poor. Hence, such problems are to be addressed. In addition, downsizing and performance improvement for sound apparatuses are to be accomplished. A signal having undergone an amplitude limitation with reference to an output potential of a high cut filter 17 which is an output by a low cut filter 12 in a high frequency band and inverted by an inverter 14 is added with, by an adder 15, an output signal from the high cut filter 17, and an addition signal is output.

IPC 8 full level

H03G 11/02 (2006.01); H03G 11/04 (2006.01); H04R 25/00 (2006.01)

CPC (source: EP US)

H03G 9/18 (2013.01 - US); H03G 11/02 (2013.01 - EP US); H03G 11/04 (2013.01 - EP US); H04R 1/1041 (2013.01 - EP US); H04R 25/353 (2013.01 - US); H04R 25/356 (2013.01 - EP US); H04R 2225/43 (2013.01 - EP US); H04R 2430/01 (2013.01 - EP US); H04R 2430/03 (2013.01 - EP US)

Citation (search report)

[X] US 4928071 A 19900522 - YAMAMOTO HIDEO [JP], et al
[XA] JP 2006197580 A 20060727 - OSHIMA KENICHI
[IA] US 2012328127 A1 20121227 - OGASAHARA NAOKAZU [JP], et al
See references of WO 2014199699A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

EP 3010146 A1 20160420; EP 3010146 A4 20170125; JP 2015019345 A 20150129; JP 6151613 B2 20170621; SG 11201510160S A 20160128; TW 201507351 A 20150216; TW I597936 B 20170901; US 10097929 B2 20181009; US 2016088404 A1 20160324; WO 2014199699 A1 20141218

DOCDB simple family (application)

EP 14811383 A 20140326; JP 2013189417 A 20130912; JP 2014058601 W 20140326; SG 11201510160S A 20140326; TW 103119627 A 20140606; US 201514956428 A 20151202